Recovering rare earths from waste phosphors using froth flotation and selective flocculation

Yu, Mingming; Mei, Gang; Li, Y.; Liu, D.; Peng, Yongjun

doi:10.19150/mmp.7855

Cited by 7 publications

(3 citation statements)

References 12 publications

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“…2 . For HA@ep@Ch, the spectra contains a strong and broad band at 3419.61 cm −1 related to the OH groups, band at 3307.73 related primary and to secondary aliphatic NH groups, band at 2908.49 related to C = CH 2 groups, band at 2875.71 related to C-H, band at 2140.86 related to C-N–C, band at 1643.26 related to substituted alkenes, band at 1566.11 related to primary amines, band at 1429.17 related to CH (bending), band at 1390.61 related to methylene, band at 1325.02 related to OH (bending), band at 1128.29 related to C-N of amine, band at 1082.01 related to C-N, band at 1035.72 aliphatic amines, band at 900.71 related to C = CH 2 ), and bands at 655.76 and 617.19 related to substituted C = C (bending) (Movasaghi et al 2008 ; Yu et al 2017 ). The presence of the characteristic bands of amino groups (3307.73 2140.86, 1566.11, 1128.29, 1082.01, and 1035.72) indicates the successful synthesis of cross-linked chitosan/poly-amine adsorbent (HA@ep@Ch).…”

Section: Resultsmentioning

confidence: 99%

“…The presence of the characteristic bands of amino groups (3307.73 2140.86, 1566.11, 1128.29, 1082.01, and 1035.72) indicates the successful synthesis of cross-linked chitosan/poly-amine adsorbent (HA@ep@Ch). The FT-IR spectra of CM@HA@ep@Ch contain bands at 3425.38 (OH groups), 3257.58 (secondary NH groups), 2914.27 (C = CH 2 ), 1728.12 (carboxylic acids, non-ionized), 1629.76 (C = O, carboxylates), 1398.32 (methylene), 1215.08 (C-O of carboxylic acids), 1082.03 (C-O of alcohols and C-N), 894.92 (C = CH 2 ), and 655.76 (C = C, bending) (Movasaghi et al 2008 ; Yu et al 2017 ). The presence of the characteristic bands of COO groups (1728.12, 1629.76, 1215.08, and 1082.03) indicates the successful synthesis of poly carboxylated/imine chitosan adsorbent (CM@HA@ep@Ch).…”

Section: Resultsmentioning

confidence: 99%

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Extraction of rare earth elements from monazite leach liquor using functionalized chitosan sorbents derived from shrimp waste

Matter,

Dhmees,

Salem

et al. 2023

Environ Sci Pollut Res

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With the growing need for high-purity rare-earth elements (REEs), the separation of these REEs has received much attention recently. The objective of this research is to produce chitosan from shrimp waste, then modify it with different functionality, and investigate the adsorption properties of chitosan adsorbents towards La(III) ions. First, from shrimp waste, chitosan (ch) with a significant degree of deacetylation, purity, and solubility was produced. The purified chitosan was cross-linked with epichlorohydrin (ep), and then, it was modified with 3,6,9,12-tetraazatetradecane-1,14-diamine (HA) to produce polyaminated chitosan (HA@ep@Ch). The polycarboxylated/imine chitosan (CM@HA@ep@Ch) was obtained by treating polyaminated chitosan with chloroacetic acid in isopropyl alcohol. The chitosan adsorbents were characterized and applied for lanthanum recovery from synthetic and monazite leach liquor samples. The factors controlling the recovery process were studied and discussed. The performance of the adsorbents was achieved through equilibrium, dynamic, and isothermal studies. HA@ep@Ch and CM@HA@ep@Ch showed good performance for lanthanum recovery with a maximum capacity of 114.52 and 141.76 mg/g at 330 K, respectively. The isotherm parameters refer to the monolayer of lanthanum adsorbed into the adsorbents through chelation and ion exchange mechanisms. A 0.5-M HCl solution was found effective to elute 95.8% of the adsorbed lanthanum on HA@ep@Ch, and 93.4% of the adsorbed lanthanum on CM@HA@ep@Ch. The adsorbents showed greater selectivity in extracting La, Ce, Pr, Nd, and Sm (62–75%) from REE leach liquid compared to extracting other REEs (20–41%).

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Extraction of rare earth elements from monazite leach liquor using functionalized chitosan sorbents derived from shrimp waste

Matter,

Dhmees,

Salem

et al. 2023

Environ Sci Pollut Res

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“…A similar approach has been recently investigated by other researchers studying the fine particle flotation of natural minerals [28,31]. Furthermore, selective flocculation has been researched with regard to the separation of chromite tailings [32][33][34], feldspars minerals [35], low-grade iron ore fines such as hematite, kaolinite, and siderite [36][37][38][39][40], iron oxide, and silica suspensions [41]; coal flotation [42][43][44]; and the recovery of rare earths [45,46] and complex copper ores [47], to cite some examples. However, in the context of black mass flotation, this approach has not yet been explored, to the best of the authors' knowledge.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Effect of Particle Size on Li-Ion Battery Recycling via Flotation and Perspectives on Selective Flocculation

Rinne¹,

Araya²,

Serna-Guerrero³

2023

Batteries

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The recycling of active materials from Li-ion batteries (LIBs) via froth flotation has gained interest recently. To date, recycled graphite has not been pure enough for direct reuse in LIB manufacturing. The present work studied the effect of particle sizes on the grade of recycled graphite. Furthermore, selective flocculation is proposed as a novel approach to control particle sizes and thus improve graphite grade by preventing the entrainment of cathode components. Zeta potential and particle size measurements were performed to find an optimal pH for electrically selective flocculation and to study the interaction of flocculants, respectively. Batch flotation experiments were performed to investigate the effect of particle size on the purity of the recovered graphite. Results suggested that, in the absence of ultrafine fine particles, battery-grade graphite of 99.4% purity could be recovered. In the presence of ultrafine particles, a grade of 98.2% was observed. Flocculating the ultrafine feed increased the grade to 98.4%, although a drop in recovery was observed. By applying a dispersant in addition to a flocculant, the recovery could be increased while maintaining a 98.4% grade. Branched flocculants provided improved selectivity over linear flocculants. The results suggest that particle size needs to be controlled for battery-grade graphite to be recovered.

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Synthesize of Poly (acrylamide-co-itaconic/TiO2) Nanocomposite for Ce(III) Sorption from Monazite Leachate

2021

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Recovering rare earths from waste phosphors using froth flotation and selective flocculation

Cited by 7 publications

References 12 publications

Extraction of rare earth elements from monazite leach liquor using functionalized chitosan sorbents derived from shrimp waste

Extraction of rare earth elements from monazite leach liquor using functionalized chitosan sorbents derived from shrimp waste

A Study on the Effect of Particle Size on Li-Ion Battery Recycling via Flotation and Perspectives on Selective Flocculation

Synthesize of Poly (acrylamide-co-itaconic/TiO2) Nanocomposite for Ce(III) Sorption from Monazite Leachate

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